Keyless lock



Oct. 27, 1925- J. G. STEGMAN xsmass LOCK Filed M '7. 1924 2 Shuts-Sheet 2 amnion Jasepb 4? 631mm;

Patented Get. 2?,

UNITED STATES JOSEPH G. STEGMAN,

OF PFEIFEB, KANSAS.

KEYLESS LOCK.

Application filed my 7,

T 0 all whom it may concern:

Be it known that I, JOSEPH G. STEGMAN, a citizen of the United States, residing at Pfeifer, in the county of Ellis and State of Kansas, have invented certain new and useful Improvements in Keyless Locks, of which the following is a specification.

This invention appertains to keyless locks and the primary object ofthe invention is to provide an improved lock embodying a plurality ofoperating levers, which must be actuated in a predetermined way beforethe bolt of the lock can be actuated, the improved lock eliminating the use of operating keys and the like.

A further object of the invention is to provide a combination lock embodying a plurality of interlocking keys, and means actuated by one of said interlocking keys for actuating the holding dog for the locking bolt, whereby the locking bolt can be manipulated, the interlocking keys being so arranged, that the same have to be actuated in predetermined order to permit the oper ation of the final key to release said bolt holding dog. f

A further object of the invention is to provide a single key for holding the bolt in an open position, after the closure has been opened if it is desired to hold the bolt in its inoperative non-locking position.

A still further object of the invention is to provide an improved combination door lock of the above character, which will be durable and ellicient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a small cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinaftermore specifically described, claimed, and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a front elevation of the iniproved lock with the cover plate of the lock casing removed, showing the locking bolt in its locked operative position,

Figure 2 is a fragmentarydetailed perspective view showing the interlocking manipulating keys.

Figure 3 is an end elevation of the improved lock showing the same attached to a door or the like, and

. Fi ure 4c is an enlarged fragmentary side eleva tion lf-the lock with the cover -=p1ate 1924. Serialno. 711,708.

removed showing the bolt in its retractive or inoperative non-locking position. v

' Referring to the drawings in detail, where in similar reference characters designate'corresponding parts throughout the several views, the letter A generally indicates the improved lock, which comprises a casing 5 which supports 'a sliding locking bolt 6, which is adapted to be projected from one end'of the casing 5 to engage a suitable keeper (not shown.) The locking bolt "6 is arranged substantially at the transverse center ofthe casing 5 for a purpose, which will be hereinafter more fully described. As shown the bolt 6 is adapted to extend through notches 7 formed in the end walls 8 and 9 of the casing 5. I p The casing 5 includes the inner wall or .plate 10, the upper and lower end walls 11 and 13 and the cover plate '14. This cover plate 14 is provided with a transversely extending-slot (not shown) for the reception of the' door knob pintle 15 which is adapted to be fitted in a suitable opening 16 formed .in the locking bolt 6. v The door knob pintle 15 is provided with any'preferred type of knob 17. The cover plate 14 can be held in position against displacement in any desired way. The upper end of the bolt is provided with a pair of spaced notches 18 and 19 for the reception of the right-angu- -larly extending foot 20 formed on the retaining key 21 which extends through the lower wall 13 of the casing 5. This key 21 is provided with a manipulating head 22. It is obvious that when the foot 20 is in the notch 19 that the bolt is held against movement, but that whenthe bolt is in its retractive position that the same can be retained in said position by permitting the foot'20 to rest in the notch 18.

Arranged within the casing 5 between the walls 10 and'lt is disposed a pair of rightangularly shaped guide brackets '23 and 24 and these brackets are arranged on each side of the bolt 6', as can be readily seen by referring to Figure 1 of the drawings. The lower he tooth '26 formed op. the locking dog 2 7 is in the notch 25 that rearward movement of the said bolt is prevented. The dog 27 has pivotally connected thereto a right-angularly disposed munipulating key 29 which slidably extends through the guide 23 and the upper wall 11. This key is provided with a manipulating .knob 30. As shown the key is held in an extended position by an expansion coil spring 31 which is coiled about said key 29 and is confined between a washer 31 and the guide 23. This operating key 29 is normally held against move ment by a locking key 32 which is arranged at right angles to the operating key 29. The key 29 is provided with a notch 33 in which is adapted to fit the right-angularly extending foot 34 formed in the said locking key 32. This locking key 32 is retained in an extended position by means of an expansion coil spring 35, which is disposed about the said key 32 between the guide 23 and the washer 32. This key is also provided with a suitable manipulating head or thumb piece 36. The locking key 32 is in turn provided with a locking key 37 so as to prevent normal operation of the key 32 and the key 37 is in turn provided with a locking key 38 so as to prevent the normal operation thereof. The key 38 in turn has engaging the same a looking key 39, which is also held against move ment by a sliding locking key 40. These keys 37, 38, 39, and 40 are all similar to the key 32 and are all held in their extended positions by means of expansion springs 41 which are coiled about the said keys and disposed between the guides 2-.) and washers 40.

It is obvious that when it is desired to actuate the dog 27, that the key 40 must first be manipulated so as to release the key 39, after which the key 39 is manipulated soas to release the key 38. The key 38 can then be pressed inward so as to release the key 37, which will permit the operation of the key 32, so that the operating key 29 can be pressed inward and thereby allow the swinging movement of the dog 27. However, the tooth 26 and dog 27 are normally held within the notch 25 formed in the bolt 6 by means of a supporting key 42 which is provided with a right-angularly disposed foot 43 which is adapted to normally overlie the notch 25 so as to hold the said tooth in the said notch. This key 42 is slidably mounted within the guide 24 and the wall 9 and is held in a predetermined position by an expansion spring 44 which is coiled about the said key and whichis disposed between the guide 24 and a washer 45 secured to the said key. The key 42 is normally held against operation by means of a key 46 which extends at right angles to the key 42. This key 46 is provided with a right-angularly disposed locking foot 47 which is adapted to fit within the notch 48' formed in the said key 42. This key 46 is in turn held against sliding movement by a locking key 47 and the key 47 is in turn held against sliding movement and against operation by a rightangularly disposed locking key 48. locking key 48 is held against movement by a key 49, which is in turn held by a similar key 50.

The keys 46, 47, 48, 49 and 50 are each held in locking position by means of the springs 50 which are coiled about each key between the guide 24 and a washer 51 secured to said keys.

In operation of the improved lock, when it is desired to retract the bolt 6 it is first necessary to actuate the key 50, then the key 49, after which the key 50 can be released, as the foot thereon will ride on the key 49. After the key 49 has been actuated the key 48 is pushed in, which releases the key 47 after which the key 47 can be pushed in, which releases the key 46. The key 46 can now be pushed in which will remove the foot 47 out of the notch 48 formed in the key 42 and the key 42 can now be manipulated so as to move the foot 43 from out of the path of the tooth 26 and dog 27. It can be seen that when a key has been released and pushed in, that the releasing key can. be let go and the same is then held inward by the right-angularly disposed foot riding on the released key. After the foot 43 has moved out of the path of the dog 26, the keys 4(), 39, 38, 37, and 32 are operated one after the other and the operating key 29 is finally operated which will permit the swinging movement of the dog, after which the knob 17 can be grasped so as to move the bolt in. Prior to the moving of the bolt, the key 21 can be actuated so as to move the foot 20 from out of the notch 1.9, and after the bolt has been moved into its full extended position this key 21 can be released so that the foot 20 will ride in the notch 18 and thus move the bolt to its retractive position.

From the foregoing description, it can be seen that I have provided an improved combination lock which cannot be actuated by unauthorized persons not knowing the correct manner of manipulating the locking key.

Changes in details may bemade without departing from the spirit or the scope of this invention, but:

lVhat I claim as new is:

1. A door lock comprising a casing, a bolt slidably mounted within the casing, means The for actuating the bolt, a pivoted dog eugaging the bolt, a sliding key pivotally connected to the dog for actuating the same, a plurality of interlocking keys for normally holding the dog operating key against movement, and a spring pressed key adapted to engage the bolt when-the same is in its retracted position for holding the bolt against closing movement.

2. A door lock comprising a casing, a sliding locking bolt mounted Within the casing, the locking bolt having a notch formed therein a pivoted dog, a tooth formed on the dog arranged to tit in said notch for normally holding the bolt against movement, means for operating the dog for 1noving the tooth from out of engagement with the walls of the notch, a sliding key arranged in the path of said tooth for normally holding the same in said notch, and a plurality of interlocking keys for engaging the first mentioned key to normally hold the same against operation.

3. A door lock comprising a casing, a sliding bolt mounted Within the casing, means for sliding the bolt, a dog for normally holding the bolt against movement, an operating key for actuating the dog, manual operable means for engaging the key for preventing operation thereof and a plurality of interlocking keys for preventing the operation of the last mentioned key.

In testimony whereof I affix my signature.

JOSEPH o. STEGMAN. 

